I need help geometry !

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

What is the measure of angle x? 37° 82° x°